Anti-seepage self-detection method for flow channel of aluminum extrusion type energy storage box

Abstract

The invention discloses an aluminum extrusion type energy storage box flow channel anti-seepage self-detection method which comprises the following steps: preparing equipment; firstly, a water tank for detection, a water pump, a three-way valve, an air source conveying device for conveying an air source, a connecting pipe connected in series with a liquid cooling box body, a hand valve for controlling return water circulation, a water return pipe and a plurality of water inlet pipes need to be prepared; the liquid and the gas are injected into the aluminum extrusion type energy storage box body flow channel, the water seepage phenomenon existing in the welding point of the aluminum extrusion type energy storage box body flow channel can be found by injecting the liquid, and the gas is matched for use; the internal pressure of the flow channel of the aluminum extrusion type energy storage box body is increased, gas high pressure can effectively break through the welding phenomena such as pseudo soldering and infirm welding, and the impermeable reliability of detection can be ensured; the aluminum extrusion type energy storage box bodies are connected in series, so that the flow channel detection efficiency of a plurality of aluminum extrusion type energy storage box bodies can be realized at a time.

Description

Technical Field

[0001] The invention relates to the technical field of energy storage box detection, and in particular to a self-detection method for anti-liquid seepage in a flow channel of an aluminum extruded energy storage box. Background Art

[0002] Aluminum extruded energy storage boxes are widely used in current energy storage systems due to their good load-bearing capacity and low mold opening cost. However, their assembly mainly relies on welding, and the thickness of aluminum profiles is uneven during extrusion, and the welds are prone to uneven penetration depth and tiny pores, which may lead to weld leakage. In order to avoid the above situation, which causes unnecessary returns, re-welding, and repairs after leaving the factory, a self-detection method for anti-leakage liquid in the flow channel of aluminum extruded energy storage boxes is proposed to solve this problem. Summary of the invention

[0003] To achieve the above object, the present invention provides the following technical solution: a self-detection method for anti-leakage liquid in the flow channel of an aluminum extruded energy storage box, comprising the following steps: Step 1: Equipment preparation: First, you need to prepare the water tank, water pump, three-way valve, gas source delivery device for delivering gas source, connecting pipes for liquid cooling box series, hand valve for controlling return water circulation, return water pipe and several water inlet pipes; Step 2: Equipment connection: First, inject an appropriate amount of energy storage battery temperature control liquid into the water tank, connect the water inlet end of the water pump to the water tank through the water inlet pipe; the water outlet end of the water pump is connected to one end of the three-way valve through the water inlet pipe; Connect the air source delivery device to one end of the side of the three-way valve through the water inlet pipe (air pipe), and the air source delivery device can directly input the air source to the three-way valve; Connect the energy storage box and one end of the three-way valve through a connection; Use a connecting pipe to connect at least four energy storage boxes in series to form a water path and a gas path, connect the energy storage box and the water tank through a return pipe, and set a hand valve on the return pipe to control the flow and closure of the water path and the gas path; Step 3: Water injection test: During the test, start the water pump, which draws liquid through the water tank and inputs it into the energy storage box through the three-way valve. The liquid passes through multiple energy storage boxes connected in series until all the inner cavity channels of the energy storage box are filled with liquid; Close the hand valve and water pump in sequence, and close the channel on the three-way valve connected to the water pump; Step 4: Input gas: Open the gas source delivery device, input the gas source into the three-way valve, let the gas source enter the energy storage box flow channel after passing through the three-way valve, and let the gas stand for no less than 30 minutes after entering the energy storage box flow channel. During the static pressure test, check the stability of the flow rate and find the leak point, and mark it after finding the leak point; Step 5: After inspection and drainage: After the static pressure test, open the manual valve switch to drain all the liquid in the flow channel, remove the energy storage box pipeline, replace the new box pipeline to be tested and repeat the test in series.

[0004] Preferably, in step 1, the number of water inlet pipes is at least three, wherein the gas source can be transported using either water inlet pipes or gas pipes.

[0005] Preferably, in step 1, a single energy storage box to be inspected has two external water spouts for connecting to the connecting pipes in series. The energy storage box to be inspected has a flow channel inside, which is a detection point. The flow channel is formed by welding of sheet aluminum profiles.

[0006] Preferably, in step 2, taking four energy storage boxes connected in series as an example, two external water nozzles of the left energy storage box are respectively connected to the return pipe and the connecting pipe; The second energy storage box on the left is connected to the connecting pipe connected to the first energy storage box, and another external water nozzle of the second energy storage box is connected to the pipe again; An external water nozzle of the third energy storage box on the left is connected to two connecting pipes connected to the second energy storage box, and another external water nozzle of the third energy storage box is connected to the connecting pipe again; The two external water nozzles of the last energy storage box are respectively connected to the connecting pipe connected to the third energy storage box and the water inlet pipe connected to the three-way valve.

[0007] Preferably, in step 4, a one-way valve is provided on the water inlet pipe or air pipe of the air source delivery device connected to the three-way valve, and the flow direction of the one-way valve is from the air source to the three-way valve.

[0008] Preferably, in step 4, the pressure delivered by the air source is set to 0.6 MPa gauge pressure compressed air.

[0009] Preferably, in step 4, water droplets or the like will appear at the welding leak point, and the leak point must be marked. After marking, the marked point is checked again to ensure that there is no missing mark.

[0010] Preferably, in step 5, if there are too many products to be tested, several groups of energy storage boxes can be connected in series for testing.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The present invention adopts liquid and gas to inject into the flow channel of aluminum extruded energy storage box. By injecting liquid, water seepage at the welding points of the flow channel of aluminum extruded energy storage box can be found. When used in combination with gas, after gas injection, the internal pressure of the flow channel of aluminum extruded energy storage box increases, and the high pressure of gas can effectively break through welding phenomena such as cold welding and loose welding, thereby ensuring the reliability of anti-penetration detection; and by connecting the aluminum extruded energy storage boxes in series, the flow channel detection of multiple aluminum extruded energy storage boxes can be realized at a time, which is simple to use, convenient to detect and highly efficient; by adopting the self-detection method, a series of problems that may occur after leaving the factory can be avoided, and the problem of return and exchange of after-sales products due to quality can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the serial detection of the present invention; Figure 2 It is a schematic diagram of the aluminum extruded energy storage box of the present invention. DETAILED DESCRIPTION

[0013] The present invention will be described in more detail below by way of examples, which are merely illustrative and do not in any way limit the scope of the present invention.

[0014] The present invention provides a technical solution: a self-detection method for preventing liquid seepage in a flow channel of an aluminum extruded energy storage box, comprising the following steps: Step 1: Equipment preparation: First, you need to prepare the water tank, water pump, three-way valve, gas source delivery device for delivering gas source, connecting pipes for liquid cooling box series, hand valve for controlling return water circulation, return water pipe and several water inlet pipes; Step 2: Equipment connection: First, inject an appropriate amount of energy storage battery temperature control liquid into the water tank, connect the water inlet end of the water pump to the water tank through the water inlet pipe; the water outlet end of the water pump is connected to one end of the three-way valve through the water inlet pipe; Connect the air source delivery device to one end of the side of the three-way valve through the water inlet pipe (air pipe), and the air source delivery device can directly input the air source to the three-way valve; Connect the energy storage box and one end of the three-way valve through a connection; Use a connecting pipe to connect at least four energy storage boxes in series to form a water path and a gas path, connect the energy storage box and the water tank through a return pipe, and set a hand valve on the return pipe to control the flow and closure of the water path and the gas path; Step 3: Water injection test: During the test, start the water pump, which draws liquid through the water tank and inputs it into the energy storage box through the three-way valve. The liquid passes through multiple energy storage boxes connected in series until all the inner cavity channels of the energy storage box are filled with liquid; Close the hand valve and water pump in sequence, and close the channel on the three-way valve connected to the water pump; Step 4: Input gas: Open the gas source delivery device, input the gas source into the three-way valve, let the gas source enter the energy storage box flow channel after passing through the three-way valve, and let the gas stand for no less than 30 minutes after entering the energy storage box flow channel. During the static pressure test, check the stability of the flow rate and find the leak point, and mark it after finding the leak point; Step 5: After inspection and drainage: After the static pressure test, open the manual valve switch to drain all the liquid in the flow channel, remove the energy storage box pipeline, replace the new box pipeline to be tested and repeat the test in series.

[0015] Embodiment 1: Equipment preparation, first of all, you need to prepare a water tank, a water pump, a three-way valve, an air source delivery device for delivering air source, a connecting pipe for the liquid cooling box in series, a hand valve for controlling the return water circulation, as well as a return pipe and several water inlet pipes; equipment connection, first inject an appropriate amount of energy storage battery temperature control liquid into the water tank, and connect the water inlet end of the water pump to the water tank through the water inlet pipe; the water outlet end of the water pump is connected to one end of the three-way valve through the water inlet pipe; the air source delivery device is connected to one end of the side of the three-way valve through the water inlet pipe (air pipe), and the air source delivery device can directly input the air source to the three-way valve; connect the energy storage box and one end of the three-way valve through a connection; use a connecting pipe to connect at least four energy storage boxes in series to form a water and air circulation, connect the energy storage box and the water tank through the return pipe, set a hand valve on the return pipe, and control The water and gas paths are circulated and closed; water injection test, during the test, start the water pump, the water pump draws liquid through the water tank, and inputs it into the energy storage box through the three-way valve. The liquid passes through multiple energy storage boxes connected in series. After the inner cavity flow channel of the energy storage box is completely filled with liquid; close the hand valve and water pump in turn, and close the channel on one side of the three-way valve connected to the water pump; input gas, open the gas source delivery device, input the gas source into the three-way valve, let the gas source pass through the three-way valve and enter the energy storage box flow channel. After the gas enters the energy storage box flow channel, let it stand for no less than 30 minutes. During the static pressure test, check the stability of the flow rate, and find the leak point. Mark the leak point after it is found; after checking the drainage and static pressure test, open the hand valve switch to drain all the liquid in the flow channel, remove the energy storage box pipeline, replace the new box pipeline to be tested, and repeat the test in series.

[0016] Embodiment 2: In the first embodiment, the following steps are added: In step 1, the number of water inlet pipes must be at least three, and the gas source can be delivered using either a water inlet pipe or an air pipe; a single energy storage box to be tested has two external water nozzles connected thereto, and the external water nozzles are used to connect the connecting pipes in series. The energy storage box to be tested has a flow channel inside, which is a detection point, and the flow channel is formed by welding of sheet aluminum profiles.

[0017] In step 2, taking four energy storage boxes connected in series as an example, the two external water nozzles of the left energy storage box are respectively connected to the return pipe and the connecting pipe; the second energy storage box on the left is connected to the connecting pipe connected to the first energy storage box, and another external water nozzle of the second energy storage box is connected to the connecting pipe again; an external water nozzle of the third energy storage box on the left is connected to the two connecting pipes connected to the second energy storage box, and another external water nozzle of the third energy storage box is connected to the connecting pipe again; the two external water nozzles of the last energy storage box are respectively connected to the connecting pipe connected to the third energy storage box and the water inlet pipe connected to the three-way valve.

[0018] Equipment preparation: first, you need to prepare the water tank, water pump, three-way valve, gas source delivery device for delivering gas source, connecting pipes in series for liquid cooling box, hand valve for controlling return water circulation, return pipe and several water inlet pipes; the number of water inlet pipes should be at least three, and the gas source can be delivered by water inlet pipe and air pipe; a single energy storage box to be tested has two external water nozzles, which are used to connect the connecting pipes in series. The energy storage box to be tested has a flow channel inside, which is the test point. The flow channel is formed by welding of sheet aluminum profiles; equipment connection: first, inject an appropriate amount of energy storage battery temperature control liquid into the water tank, Connect the water inlet end of the water pump to the water tank through the water inlet pipe; connect the water outlet end of the water pump to one end of the three-way valve through the water inlet pipe; connect the air source delivery device to one end of the side of the three-way valve through the water inlet pipe (air pipe), and the air source delivery device can directly input the air source to the three-way valve; connect the energy storage box and one end of the three-way valve through connection; use a connecting pipe to connect at least four energy storage boxes in series to form a water path and air path circulation, connect the energy storage box and the water tank through a return pipe, and set a hand valve on the return pipe to control the circulation and closure of the water path and air path; take the four energy storage boxes in series as an example, the two external water nozzles of the left energy storage box are respectively connected The return pipe and the connecting pipe; the second energy storage box on the left is connected to the connecting pipe connected to the first energy storage box, and another external water nozzle of the second energy storage box is connected to the pipe again; an external water nozzle of the third energy storage box on the left is connected to the two connecting pipes connected to the second energy storage box, and another external water nozzle of the third energy storage box is connected to the connecting pipe again; the two external water nozzles of the last energy storage box are respectively connected to the connecting pipe connected to the third energy storage box and the water inlet pipe connected to the three-way valve; water injection test, during the test, start the water pump, the water pump draws liquid through the water tank, and inputs it into the energy storage box through the three-way valve, and the liquid passes through multiple series Energy storage box, wait until the inner cavity flow channel of the energy storage box is completely filled with liquid; close the hand valve and water pump in turn, and close the channel on one side of the three-way valve connected to the water pump; input gas, open the gas source delivery device, input the gas source into the three-way valve, let the gas source pass through the three-way valve and enter the energy storage box flow channel, and let the gas stand for no less than 30 minutes after entering the energy storage box flow channel. During the static pressure test, check the stability of the flow rate and find the leakage point, and mark it after finding the leakage; after checking the drainage and static pressure test, open the hand valve switch to drain all the liquid in the flow channel, remove the energy storage box pipeline, replace the new box pipeline to be tested and repeat the test in series.

[0019] Embodiment 3, In the second embodiment, the following steps are added: In step 4, a one-way valve is installed on the water inlet pipe or air pipe of the gas source delivery device connected to the three-way valve, and the flow direction of the one-way valve is from the gas source to the three-way valve; the pressure of the gas source delivery is set to 0.6MPa gauge pressure compressed air; water droplets will appear at the welding leakage point, and the leakage point must be marked. After marking, check the marked point again to ensure that there is no missing mark.

[0020] Equipment preparation: first, you need to prepare a water tank, water pump, three-way valve, air source delivery device for delivering air source, connecting pipes in series for liquid cooling boxes, hand valves for controlling return water circulation, return pipes and several water inlet pipes; there must be at least three water inlet pipes, of which both water inlet pipes and air pipes can be used for air source delivery; a single energy storage box to be tested has two external water nozzles, which are used to connect the connecting pipes in series. The energy storage box to be tested has a flow channel inside, which is the test point. The flow channel is formed by welding of sheet aluminum profiles; equipment connection: first, inject an appropriate amount of energy storage battery temperature control liquid into the water tank, connect the water inlet end of the water pump to the water tank through the water inlet pipe; the water outlet end of the water pump is connected to the water tank through the water inlet pipe. The pipe is connected to one end of the three-way valve; the air source delivery device is connected to one end of the side of the three-way valve through the water inlet pipe (air pipe), and the air source delivery device can directly input the air source to the three-way valve; the energy storage box and one end of the three-way valve are connected by connection; at least four energy storage boxes are connected in series by using a connecting pipe to form a water path and an air path flow, and the energy storage box and the water tank are connected through a return pipe, and a hand valve is set on the return pipe to control the flow and closure of the water path and the air path; taking the four energy storage boxes connected in series as an example, the two external water nozzles of the left energy storage box are respectively connected to the return pipe and the connecting pipe; the second energy storage box on the left is connected to the connecting pipe connected to the first energy storage box, and another external water nozzle of the second energy storage box is connected to the pipe again; An external water nozzle of the third energy storage box on the left is connected to the two connecting pipes connected to the second energy storage box, and another external water nozzle of the third energy storage box is connected to the connecting pipe again; the two external water nozzles of the last energy storage box are respectively connected to the connecting pipe connected to the third energy storage box and the water inlet pipe connected to the three-way valve; during the water injection test, start the water pump, the water pump draws liquid through the water tank, and inputs it into the energy storage box through the three-way valve. The liquid passes through multiple series-connected energy storage boxes, and after the inner cavity flow channel of the energy storage box is fully filled with liquid; close the hand valve and the water pump in turn, and close the channel on one side of the three-way valve connected to the water pump; input gas, open the gas source delivery device, input the gas source into the three-way valve, and let the gas source enter the energy storage box after passing through the three-way valve After the gas enters the flow channel of the energy storage box, it is left to stand for no less than 30 minutes. During the static pressure test, the stability of the flow is detected, and the leakage point is found. After the leakage is found, it is marked; a one-way valve is set on the water inlet pipe or air pipe of the gas source delivery device connected to the three-way valve, and the flow direction of the one-way valve is from the gas source to the three-way valve; the pressure of the gas source delivery is set to 0.6MPa gauge pressure compressed air; water droplets will appear at the welding leakage point, and it is necessary to mark the leakage point. After marking, check the marked point again to ensure that there is no missing mark; after checking the drainage and static pressure test, open the manual valve switch to discharge all the liquid in the flow channel, remove the energy storage box pipeline, replace the new box pipeline to be tested and repeat the test in series.

[0021] Embodiment 4: In the third embodiment, the following steps are added: In step 5, if there are too many products to be tested, a plurality of energy storage boxes can be connected in series for testing.

[0022] Equipment preparation: first, you need to prepare a water tank, a water pump, a three-way valve, an air source delivery device for delivering the air source, a connecting pipe in series with the liquid cooling box, a hand valve for controlling the return water circulation, a return pipe and several water inlet pipes; there must be at least three water inlet pipes, of which both the water inlet pipe and the air pipe can be used for the delivery of the air source; a single energy storage box to be tested has two external water nozzles, which are used to connect the connecting pipes in series. The energy storage box to be tested has a flow channel inside, which is the test point. The flow channel is formed by welding of sheet aluminum profiles; equipment connection: first, inject an appropriate amount of energy storage battery temperature control liquid into the water tank, and connect the water inlet end of the water pump to the water tank through the water inlet pipe; the water outlet end of the water pump is connected to the water outlet end through the water inlet pipe and the three-way valve. One end is connected; the air source delivery device is connected to one end of the side of the three-way valve through the water inlet pipe (air pipe), and the air source delivery device can directly input the air source to the three-way valve; the energy storage box and one end of the three-way valve are connected by connection; at least four energy storage boxes are connected in series by using a connecting pipe to form a water path and an air path circulation, and the energy storage box and the water tank are connected through a return pipe, and a hand valve is set on the return pipe to control the circulation and closure of the water path and the air path; taking the four energy storage boxes in series as an example, the two external water nozzles of the left energy storage box are respectively connected to the return pipe and the connecting pipe; the second energy storage box on the left is connected to the connecting pipe connected to the first energy storage box, and another external water nozzle of the second energy storage box is connected to the pipe again; an external nozzle of the third energy storage box on the left The connecting water nozzle is connected to the two connecting pipes connected to the second energy storage box, and another external water nozzle of the third energy storage box is connected to the connecting pipe again; the two external water nozzles of the last energy storage box are respectively connected to the connecting pipe connected to the third energy storage box and the water inlet pipe connected to the three-way valve; during the water injection test, the water pump is started, the water pump draws liquid through the water tank, and inputs it into the energy storage box through the three-way valve. The liquid passes through multiple series-connected energy storage boxes, and after the inner cavity flow channel of the energy storage box is completely filled with liquid; the hand valve and the water pump are closed in turn, and the channel on one side of the three-way valve connected to the water pump is closed; gas is input, the gas source delivery device is turned on, the gas source is input into the three-way valve, and the gas source passes through the three-way valve and enters the energy storage box flow channel. After the gas enters the energy storage box flow channel, it is allowed to stand for not less than 30min. During the static pressure test, check the stability of the flow rate and find the leakage point. Mark it after finding the leakage. Set a one-way valve on the water inlet pipe or air pipe of the gas source delivery device connected to the three-way valve, and the flow direction of the one-way valve is from the gas source to the three-way valve. Set the pressure of the gas source delivery to 0.6MPa gauge pressure compressed air. Water droplets will appear at the welding leakage point, and it is necessary to mark the leakage point. After marking, check the marked point again to ensure that there is no missing mark. After checking the drainage and static pressure test, open the manual valve switch to drain all the liquid in the flow channel, remove the energy storage box pipeline, replace the new box pipeline to be tested and repeat the test in series. If there are too many products to be tested, several groups of energy storage boxes can be connected in series for testing.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-detection method for preventing liquid seepage in the flow channel of an aluminum extruded energy storage box, characterized in that: The following steps are involved: Step 1: Equipment preparation: First, you need to prepare the water tank, water pump, three-way valve, gas source delivery device for delivering gas source, connecting pipes for liquid cooling box series, hand valve for controlling return water circulation, return water pipe and several water inlet pipes; Step 2: Equipment connection: First, inject an appropriate amount of energy storage battery temperature control liquid into the water tank, connect the water inlet end of the water pump to the water tank through the water inlet pipe; the water outlet end of the water pump is connected to one end of the three-way valve through the water inlet pipe; Connect the air source delivery device to one end of the side of the three-way valve through the water inlet pipe (air pipe), and the air source delivery device can directly input the air source to the three-way valve; Connect the energy storage box and one end of the three-way valve through a connection; Use a connecting pipe to connect at least four energy storage boxes in series to form a water path and a gas path, connect the energy storage box and the water tank through a return pipe, and set a hand valve on the return pipe to control the flow and closure of the water path and the gas path; Step 3: Water injection test: During the test, start the water pump, which draws liquid through the water tank and inputs it into the energy storage box through the three-way valve. The liquid passes through multiple energy storage boxes connected in series until all the inner cavity channels of the energy storage box are filled with liquid; Close the hand valve and water pump in sequence, and close the channel on the three-way valve connected to the water pump; Step 4: Input gas: Open the gas source delivery device, input the gas source into the three-way valve, let the gas source enter the energy storage box flow channel after passing through the three-way valve, and let the gas stand for no less than 30 minutes after entering the energy storage box flow channel. During the static pressure test, check the stability of the flow rate and find the leak point, and mark it after finding the leak point; Step 5: After inspection and drainage: After the static pressure test, open the manual valve switch to drain all the liquid in the flow channel, remove the energy storage box pipeline, replace the new box pipeline to be tested and repeat the test in series.

2. The method for self-detecting anti-liquid seepage in the flow channel of an aluminum extruded energy storage box according to claim 1, characterized in that: In step 1, the number of water inlet pipes must be at least three, and the gas source can be transported using either water inlet pipes or gas pipes.

3. The method for self-detecting anti-liquid seepage in the flow channel of an aluminum extruded energy storage box according to claim 1, characterized in that: In step 1, a single energy storage box to be tested has two external water nozzles connected thereto, and the external water nozzles are used to connect the connecting pipes in series. The energy storage box to be tested has a flow channel inside, which is a test point. The flow channel is formed by welding of sheet aluminum profiles.

4. The method for self-detecting anti-liquid seepage in the flow channel of an aluminum extruded energy storage box according to claim 1, characterized in that: In step 2, taking four energy storage boxes connected in series as an example, the two external water nozzles of the left energy storage box are respectively connected to the return pipe and the connecting pipe; The second energy storage box on the left is connected to the connecting pipe connected to the first energy storage box, and another external water nozzle of the second energy storage box is connected to the pipe again; An external water nozzle of the third energy storage box on the left is connected to two connecting pipes connected to the second energy storage box, and another external water nozzle of the third energy storage box is connected to the connecting pipe again; The two external water nozzles of the last energy storage box are respectively connected to the connecting pipe connected to the third energy storage box and the water inlet pipe connected to the three-way valve.

5. The method for self-detecting anti-liquid seepage in the flow channel of an aluminum extruded energy storage box according to claim 1, characterized in that: In step 4, a one-way valve is provided on the water inlet pipe or the air pipe of the air source delivery device connected to the three-way valve, and the flow direction of the one-way valve is from the air source to the three-way valve.

6. The method for self-detecting anti-liquid seepage in the flow channel of an aluminum extruded energy storage box according to claim 1, characterized in that: In step 4, the pressure of the air source delivery is set to 0.6 MPa gauge compressed air.

7. The method for self-detecting anti-liquid seepage in the flow channel of an aluminum extruded energy storage box according to claim 1, characterized in that: In step 4, water droplets will appear at the welding leak point, so you must mark the leak point. After marking, check the marked point again to ensure that there is no missing mark.

8. The method for self-detecting anti-liquid seepage in the flow channel of an aluminum extruded energy storage box according to claim 1, characterized in that: In step 5, if there are too many products to be tested, a plurality of energy storage boxes can be connected in series for testing.

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